Understanding Combinations and Permutations

The video tutorial provides an overview of the concept of combinations in mathematics, explaining its fundamental principles and applications.

What is the basic idea behind the concept of combination?

• Selecting items without considering the order

• Arranging items in a specific order

• Counting the number of items

• Measuring the size of items

Which of the following is an example of a combination?

• Choosing 3 out of 5 fruits

• Arranging 3 books on a shelf

• Counting the number of students in a class

• Measuring the height of 3 plants

How does combination differ from permutation?

• Both consider order

• Combination does not consider order, permutation does

• Neither consider order

• Combination considers order, permutation does not

In a combination, if you have 5 items and choose 2, how many possible combinations are there?

• 10

• 15

• 20

• 5

Which formula is used to calculate combinations?

• n! * r!

• n! / r!

• n! / (n-r)!

• n! / (r! * (n-r)!)